A couple people suggested p2p mechanisms as a way to enable downloads for anyone, and asked about restrictions on copying in the EULA.  Offhand, P2P seems like a great solution here, and I've started a thread with our legal department about making it so the EULA doesn't preclude it.  It's going to take a while to resolve - you can imagine that a request to enable massive copying of software is somewhat unusual :-)  In any case changes would not show up in the EULA until the next technical preview drop, which means we still don't have public access for this one.  As I said before, we don't have all the answers yet but we do want to enable participation for anyone who is interested.  We took a step forward this time but we're not finished yet.